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Spry, Edward; John Huxham. 1755–56. An Account of the Case of a Man Who Died of the Effects of the Fire at Eddy-Stone Light-House. By Mr. Edward Spry, Surgeon at Plymouth. Philosophical Transactions of the Royal Society. 49: 477–484. doi:10.1098/rstl.1755.0066. JSTOR104958
Tag, Thomas. Hyper-Radial Lenses. United States Lighthouse Society. Inačica izvorne stranice arhivirana 29. listopada 2020. Pristupljeno 25. siječnja 2020.
Tag, Thomas. Hyper-Radial Lenses. United States Lighthouse Society. Inačica izvorne stranice arhivirana 29. listopada 2020. Pristupljeno 25. siječnja 2020.